In this lab, you'll be making your own H-R diagrams for three unknown clusters. Once you have your plots made, compare them to find out how old they are relative to each other. In this excel spreadsheet , I have included 3 tabs of data. Each tab has measurements of brightnesses of stars in a different cluster; the letters denote what wavelength the measurement is in. For each cluster, make and plot an HR diagram. Make sure the y axis values are flipped (large magnitude = faint, small magnitude = bright), and then paste your figures onto the final tab so you can directly compare them. If you get stuck, there are hints on the final tab. Answer the question below and upload your HR diagrams. Question 1 is worth 20% of your score on this lab, and your uploaded figures (axes labeled and plots titled) are worth 80%. I will deduct points for missing axis labels or if your Y axes aren't in reverse order. If you aren't sure how to take a screen grab, here are instructions for windows and chromebooks . On macs, command+shift +4 (or command +$ ) will let you draw a box and save that to your desktop. Command+shift +5 will bring up a screen grab utility. Good luck, astronomers! Question: 1. List the clusters in order from youngest to oldest. How did you come to this conclusion?.

1. In this lab, you'll be making your own H-R diagrams for three unknown clusters. Once you have
your plots made, compare them to find out how old they are relative to each other. In this excel
spreadsheet , I have included 3 tabs of data. Each tab has measurements of brightnesses of stars
in a different cluster; the letters denote what wavelength the measurement is in. For each cluster,
make and plot an HR diagram. Make sure the y axis values are flipped (large magnitude = faint,
small magnitude = bright), and then paste your figures onto the final tab so you can directly
compare them. If you get stuck, there are hints on the final tab. Answer the question below and
upload your HR diagrams. Question 1 is worth 20% of your score on this lab, and your uploaded
figures (axes labeled and plots titled) are worth 80%. I will deduct points for missing axis labels or
if your Y axes aren't in reverse order. If you aren't sure how to take a screen grab, here are
instructions for windows and chromebooks . On macs, command+shift +4 (or command +$ ) will
let you draw a box and save that to your desktop. Command+shift +5 will bring up a screen grab
utility. Good luck, astronomers! Question: 1. List the clusters in order from youngest to oldest. How
did you come to this conclusion?